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Revista de Ciências Agrárias

Print version ISSN 0871-018X


BUJAN, E.; GARCIA-ARRESE, A.; VELASCO-MOLINA, M.  and  MACIAS, F.. Soil solution in soils under Erica andevalensis formations in the Riotinto mining area (Huelva, SW Spain). Rev. de Ciências Agrárias [online]. 2010, vol.33, n.1, pp.111-118. ISSN 0871-018X.

Erica andevalensis is an endemic heather in the Iberian Pyrite Belt listed as endan­gered species by Junta de Andalucía (De­cree 104/1994, Law 8/2003) which grows spontaneously in mining areas. The study of soil solution may be a useful tool to charac­terize the geochemical conditions of its habitat. We analyzed the soil solution of 11 plots from two mining areas in Riotinto. Ion speciation was obtained using the SOL­MIN88 software. Our results indicate that it grows ade­quately under a wide range of conditions, being tolerant to ionic strength until up to 10-2 M, soil solutions ranging from hyper­acid (3.43) to neutral (6.97) and with vari­able ions (sulphate 4-376, Ca 0.3-25 and Mg 0.1-25 mg L-1) and metals (Al 0.1-10, Cu 0.01-3.94, Pb 0.01-0.23, Zn 0.01-1.88 y Mn 0.02-2.81 mg L-1) concentrations. This spe­cies seems to be indifferent to the dominant cation of the soil solution. The Al-tolerant character of this species was also confirmed.

Keywords : Erica andevalensis; habitat; mine soils; soil solution.

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